The name Phoenix is overused. There is an Elixir framework called Phoenix. I think I also heard of other projects with that same name before. It's a bit like the name 'Apollo'; besides the moon landing project, I know like 2 dev projects called that and also there is a sales SaaS platform with that name. Surely people should run a search first before choosing a name...
From the ashes of some previous project is born some new project . It's symbolic. I remember people naming new software projects this back in the 1980s for the same reason.
They could at least use PhoenX or FenX to link it with X